A few weeks ago we took at look at the performance of Intel's latest Core 2 CPUs, the Core 2 Extreme X6800 and Core 2 Duo E6700, finding them to be excellent performers. But what if you don't have the budget to spend $500+ on a new CPU? This is where Intel's Core 2 Duo E6400 comes in. It ships with lower clock speeds and a smaller L2 cache, but as you'll see in today's benchmarks, it still puts up respectable numbers. In fact, with a little bit of overclocking (how does a 1.3GHz overclock sound?) it will actually outrun a Core 2 Extreme. See how this CPU performs in comparison to the latest and greatest, as well as older CPUs like the Athlon 64 X2 4800 and Athlon 64 3500+ in both single-GPU and multi-GPU setups in this review!